panic: lock (rwlock) vcpulock not locked Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *281555 56206 0 0 0 1 syz-executor9310 75593 81265 0 0x12 0x8 0 sshd db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82431be5) at panic+0x177 sys/kern/subr_prf.c:202 witness_assert(ffff800021234bb0,4) at witness_assert+0x3ef sys/kern/subr_witness.c:1950 vcpu_reload_vmcs_vmx(ffff800021234800) at vcpu_reload_vmcs_vmx+0x30 sys/arch/amd64/amd64/vmm.c:1768 vcpu_writeregs_vmx(ffff800021234800,b3,1,ffff800000b07410) at vcpu_writeregs_vmx+0x4a sys/arch/amd64/amd64/vmm.c:2096 vmmioctl(a00,82485608,ffff800000b07400,1,ffff80002121efc0) at vmmioctl+0x175 VOP_IOCTL(fffffd806e4f3ad0,82485608,ffff800000b07400,1,fffffd807f7d8780,ffff80002121efc0) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:295 vn_ioctl(fffffd806e49ca28,82485608,ffff800000b07400,ffff80002121efc0) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002121efc0,ffff8000212311d8,ffff800021231220) at sys_ioctl+0x4a2 syscall(ffff8000212312a0) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212312a0) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffac70, count: 4 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: lock (rwlock) vcpulock not locked ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82431be5) at panic+0x177 sys/kern/subr_prf.c:202 witness_assert(ffff800021234bb0,4) at witness_assert+0x3ef sys/kern/subr_witness.c:1950 vcpu_reload_vmcs_vmx(ffff800021234800) at vcpu_reload_vmcs_vmx+0x30 sys/arch/amd64/amd64/vmm.c:1768 vcpu_writeregs_vmx(ffff800021234800,b3,1,ffff800000b07410) at vcpu_writeregs_vmx+0x4a sys/arch/amd64/amd64/vmm.c:2096 vmmioctl(a00,82485608,ffff800000b07400,1,ffff80002121efc0) at vmmioctl+0x175 VOP_IOCTL(fffffd806e4f3ad0,82485608,ffff800000b07400,1,fffffd807f7d8780,ffff80002121efc0) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:295 vn_ioctl(fffffd806e49ca28,82485608,ffff800000b07400,ffff80002121efc0) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002121efc0,ffff8000212311d8,ffff800021231220) at sys_ioctl+0x4a2 syscall(ffff8000212312a0) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212312a0) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffac70, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800021230cb0 rbx 0xffff800020d39bff rdx 0x8b rcx 0x2 rax 0x29 r8 0xffffffff81a0be34 kprintf+0x144 r9 0x1 r10 0x29245c6bdc66ef74 r11 0x2b74850c5937833 r12 0xffff800020d39a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81e3e908 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021230ca0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor9310) pid=281555 stat=onproc flags process=0 proc=0 pri=55, usrpri=55, nice=20 forw=0xffffffffffffffff, list=0xffff80002121ed20,0xffffffff82913618 process=0xffff80002120a190 user=0xffff80002122c000, vmspace=0xfffffd806f1beb88 estcpu=10, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *56206 281555 64067 0 7 0 syz-executor9310 64067 199194 54285 0 3 0x82 nanoslp syz-executor9310 54285 49588 81265 0 3 0x10008a sigsusp ksh 81265 75593 5606 0 7 0x1a sshd 68922 469208 1 0 3 0x100083 ttyin getty 5606 413813 1 0 3 0x88 select sshd 92223 306765 93454 74 3 0x100092 bpf pflogd 93454 407883 1 0 3 0x80 netio pflogd 33558 429473 44225 73 3 0x100090 kqread syslogd 44225 470534 1 0 3 0x100082 netio syslogd 51182 150900 1 0 3 0x100080 kqread resolvd 34615 315689 50440 77 3 0x100092 kqread dhcpleased 7043 388100 50440 77 3 0x100092 kqread dhcpleased 50440 281101 1 0 3 0x80 kqread dhcpleased 80480 345808 0 0 3 0x14200 bored smr 73601 308887 0 0 3 0x14200 pgzero zerothread 1549 342978 0 0 3 0x14200 aiodoned aiodoned 16878 413252 0 0 3 0x14200 syncer update 75734 138900 0 0 3 0x14200 cleaner cleaner 24078 42306 0 0 3 0x14200 reaper reaper 28978 467441 0 0 3 0x14200 pgdaemon pagedaemon 48926 389136 0 0 3 0x14200 bored crynlk 85269 106349 0 0 3 0x14200 bored crypto 39118 150192 0 0 3 0x14200 bored viomb 80353 184756 0 0 3 0x40014200 acpi0 acpi0 12246 449722 0 0 3 0x40014200 idle1 45108 148239 0 0 2 0x14200 softnet 12088 149797 0 0 3 0x14200 bored systqmp 63724 509842 0 0 3 0x14200 bored systq 74356 293773 0 0 3 0x40014200 bored softclock 46199 290697 0 0 3 0x40014200 idle0 1 41103 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 81265 (sshd) thread 0xffff80002121e2a0 (75593) exclusive rwlock netlock r = 0 (0xffffffff827cea90) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 solock+0x86 sys/kern/uipc_socket2.c:295 #2 sosend+0x22a sys/kern/uipc_socket.c:506 #3 dofilewritev+0x1a3 sys/kern/sys_generic.c:365 #4 sys_write+0x83 sys/kern/sys_generic.c:285 #5 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10111 6416K 6417K 78643K 11201 0 pcb 13 8K 8K 78643K 13 0 rtable 62 2K 2K 78643K 112 0 ifaddr 29 8K 8K 78643K 30 0 counters 40 33K 33K 78643K 40 0 ioctlops 1 1K 4K 78643K 1482 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 6 0 vnodes 1183 74K 75K 78643K 1188 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 1 0K 0K 78643K 1 0 proc 67 87K 87K 78643K 278 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 2K 78643K 348 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 84 20K 20K 78643K 1736 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 4 0 temp 23 4193K 4257K 78643K 1966 0 kqueue 9 12K 12K 78643K 9 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 17 0 14 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 35 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 304 32 0 26 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 9 0 2 1 0 1 1 0 8 0 pfstkey 112 9 0 2 1 0 1 1 0 8 0 pfstate 320 9 0 2 1 0 1 1 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1413 0 23 87 0 87 87 0 8 0 ffsino 272 1413 0 23 93 0 93 93 0 8 0 nchpl 144 1588 0 40 58 0 58 58 0 8 0 uvmvnodes 72 1423 0 0 26 0 26 26 0 8 0 vnodes 224 1423 0 0 84 0 84 84 0 8 0 namei 1024 4149 0 4149 2 1 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 vcpupl 2048 1 0 0 1 0 1 1 0 8 0 vmpool 560 1 0 0 1 0 1 1 0 8 0 scxspl 216 3685 0 3685 10 9 1 8 0 8 1 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 424 257 0 225 5 0 5 5 0 8 0 knotepl 112 23 0 0 1 0 1 1 0 8 0 kqueuepl 216 5 0 0 1 0 1 1 0 8 0 pipepl 336 69 0 66 2 1 1 1 0 8 0 fdescpl 496 241 0 225 3 0 3 3 0 8 0 filepl 152 1087 0 1028 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 69 0 57 1 0 1 1 0 8 0 zombiepl 144 225 0 225 2 1 1 1 0 8 1 processpl 1072 257 0 225 3 0 3 3 0 8 0 procpl 672 257 0 225 4 0 4 4 0 8 0 sockpl 480 84 0 60 5 1 4 4 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 82 0 0 11 1 10 11 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 129 0 0 9 0 9 9 0 8 0 bufpl 280 2013 0 93 138 0 138 138 0 8 0 anonpl 24 32796 0 30485 18 3 15 17 0 186 1 amapchunkpl 152 3023 0 2879 8 1 7 8 0 158 0 amappl16 200 97 0 92 1 0 1 1 0 8 0 amappl15 192 1 0 0 1 0 1 1 0 8 0 amappl13 176 20 0 18 1 0 1 1 0 8 0 amappl12 168 1 0 1 1 1 0 1 0 8 0 amappl11 160 42 0 28 1 0 1 1 0 8 0 amappl10 152 23 0 19 1 0 1 1 0 8 0 amappl9 144 21 0 18 1 0 1 1 0 8 0 amappl8 136 272 0 272 2 1 1 1 0 8 1 amappl7 128 52 0 45 1 0 1 1 0 8 0 amappl6 120 87 0 82 1 0 1 1 0 8 0 amappl5 112 577 0 560 1 0 1 1 0 8 0 amappl4 104 525 0 506 1 0 1 1 0 8 0 amappl3 96 49 0 46 1 0 1 1 0 8 0 amappl2 88 403 0 357 3 1 2 2 0 8 0 amappl1 80 7573 0 7191 11 2 9 9 0 8 0 amappl 88 1491 0 1425 2 0 2 2 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 242 0 225 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 242 0 225 1 0 1 1 0 8 0 vmmpekpl 168 6006 0 5988 1 0 1 1 0 8 0 vmmpepl 168 22906 0 22038 44 3 41 41 0 357 1 vmsppl 368 241 0 225 2 0 2 2 0 8 0 rwobjpl 56 7216 0 6660 11 2 9 9 0 8 1 pdppl 4096 492 0 451 64 22 42 48 0 8 1 pvpl 32 112040 0 107824 42 4 38 38 0 265 1 pmappl 224 241 0 225 2 0 2 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 290 0 28 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82809ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x5f sys/dev/kcov.c:149 __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 __mp_acquire_count(ffffffff82838a18,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 tsleep(ffffffff8292d680,118,ffffffff824f0138,0) at tsleep+0x172 dopselect(ffff80002121e2a0,a,9812625fea0,980d6f0da20,0,0) at dopselect+0x712 sys/kern/sys_generic.c:657 sys_pselect(ffff80002121e2a0,ffff800021211a50,ffff800021211aa0) at sys_pselect+0x13a sys/kern/sys_generic.c:579 syscall(ffff800021211b20) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021211b20) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcbef0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff82809ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x5f sys/dev/kcov.c:149 __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 __mp_acquire_count(ffffffff82838a18,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 tsleep(ffffffff8292d680,118,ffffffff824f0138,0) at tsleep+0x172 dopselect(ffff80002121e2a0,a,9812625fea0,980d6f0da20,0,0) at dopselect+0x712 sys/kern/sys_generic.c:657 sys_pselect(ffff80002121e2a0,ffff800021211a50,ffff800021211aa0) at sys_pselect+0x13a sys/kern/sys_generic.c:579 syscall(ffff800021211b20) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021211b20) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcbef0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82431be5) at panic+0x177 sys/kern/subr_prf.c:202 witness_assert(ffff800021234bb0,4) at witness_assert+0x3ef sys/kern/subr_witness.c:1950 vcpu_reload_vmcs_vmx(ffff800021234800) at vcpu_reload_vmcs_vmx+0x30 sys/arch/amd64/amd64/vmm.c:1768 vcpu_writeregs_vmx(ffff800021234800,b3,1,ffff800000b07410) at vcpu_writeregs_vmx+0x4a sys/arch/amd64/amd64/vmm.c:2096 vmmioctl(a00,82485608,ffff800000b07400,1,ffff80002121efc0) at vmmioctl+0x175 VOP_IOCTL(fffffd806e4f3ad0,82485608,ffff800000b07400,1,fffffd807f7d8780,ffff80002121efc0) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:295 vn_ioctl(fffffd806e49ca28,82485608,ffff800000b07400,ffff80002121efc0) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002121efc0,ffff8000212311d8,ffff800021231220) at sys_ioctl+0x4a2 syscall(ffff8000212312a0) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212312a0) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffac70, count: 4 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82431be5) at panic+0x177 sys/kern/subr_prf.c:202 witness_assert(ffff800021234bb0,4) at witness_assert+0x3ef sys/kern/subr_witness.c:1950 vcpu_reload_vmcs_vmx(ffff800021234800) at vcpu_reload_vmcs_vmx+0x30 sys/arch/amd64/amd64/vmm.c:1768 vcpu_writeregs_vmx(ffff800021234800,b3,1,ffff800000b07410) at vcpu_writeregs_vmx+0x4a sys/arch/amd64/amd64/vmm.c:2096 vmmioctl(a00,82485608,ffff800000b07400,1,ffff80002121efc0) at vmmioctl+0x175 VOP_IOCTL(fffffd806e4f3ad0,82485608,ffff800000b07400,1,fffffd807f7d8780,ffff80002121efc0) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:295 vn_ioctl(fffffd806e49ca28,82485608,ffff800000b07400,ffff80002121efc0) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80002121efc0,ffff8000212311d8,ffff800021231220) at sys_ioctl+0x4a2 syscall(ffff8000212312a0) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000212312a0) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffac70, count: -11 ddb{1}>